::fixture-ready::
$ head -8 fixtures/incidents/app.log
2026-06-25T14:00:01Z level=INFO service=api request_id=req-100 msg=started release=2026.06.25.1
2026-06-25T14:01:14Z level=INFO service=worker request_id=req-101 msg=queue_depth value=18
2026-06-25T14:02:06Z level=WARN service=api request_id=req-102 msg=upstream_slow upstream=db latency_ms=2200
2026-06-25T14:03:08Z level=ERROR service=api request_id=req-103 msg=database_timeout timeout_ms=30000
2026-06-25T14:03:12Z level=ERROR service=api request_id=req-103 msg=retry_failed upstream=db
2026-06-25T14:04:44Z level=INFO service=deploy request_id=req-104 msg=release_switch release=2026.06.25.2
2026-06-25T14:05:10Z level=FATAL service=worker request_id=req-105 msg=job_runner_exit code=137
2026-06-25T14:05:12Z level=INFO service=system request_id=req-106 msg=worker_restarted
::exit-code::0
$ awk '{buf[NR%5]=$0} tolower($0) ~ /(error|exception|fatal)/ {for (i=NR-4;i<=NR;i++) if (i>0) print buf[i%5]; exit}' fixtures/incidents/app.log
2026-06-25T14:00:01Z level=INFO service=api request_id=req-100 msg=started release=2026.06.25.1
2026-06-25T14:01:14Z level=INFO service=worker request_id=req-101 msg=queue_depth value=18
2026-06-25T14:02:06Z level=WARN service=api request_id=req-102 msg=upstream_slow upstream=db latency_ms=2200
2026-06-25T14:03:08Z level=ERROR service=api request_id=req-103 msg=database_timeout timeout_ms=30000
::exit-code::0